61682100643 has 2 divisors, whose sum is σ = 61682100644. Its totient is φ = 61682100642.

The previous prime is 61682100629. The next prime is 61682100709. The reversal of 61682100643 is 34600128616.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61682100643 - 2²¹ = 61680003491 is a prime.

It is not a weakly prime, because it can be changed into another prime (61682100743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30841050321 + 30841050322.

It is an arithmetic number, because the mean of its divisors is an integer number (30841050322).

Almost surely, 2^61682100643 is an apocalyptic number.

61682100643 is a deficient number, since it is larger than the sum of its proper divisors (1).

61682100643 is an equidigital number, since it uses as much as digits as its factorization.

61682100643 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 41472, while the sum is 37.

The spelling of 61682100643 in words is "sixty-one billion, six hundred eighty-two million, one hundred thousand, six hundred forty-three".